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Article
Publication date: 29 April 2021

Dina Ghazzawi, Donna Lynn Pattison, Catherine Horn, John Hardy and Beverly Brown

This study examines the impact of participation in a STEM Enrichment Summer Bridge Program, funded by the NSF Houston-Louis Stokes Alliance for Minority Participation, on…

Abstract

Purpose

This study examines the impact of participation in a STEM Enrichment Summer Bridge Program, funded by the NSF Houston-Louis Stokes Alliance for Minority Participation, on undergraduate student success outcomes, particularly for under-represented students.

Design/methodology/approach

The study uses propensity score matching and logistic regression analysis to examine the effects of participation in the STEM enrichment program on graduation and retention in STEM after matching on baseline socio-demographic and pre-college characteristics.

Findings

The analysis found that program participation had a significant effect on increasing both the graduation rates and retention of under-represented minority students in STEM fields. In addition, results indicated that program participation had a particularly strong impact for Pell-eligible students in terms of course grades.

Research limitations/implications

Data obtained for this study were limited to a single Hispanic-serving/Asian-serving institution, and therefore are not necessarily representative of the graduation and retention trends of the larger population of underrepresented minority (URM) students across the nation.

Originality/value

This study uniquely adds to the existing body of literature surrounding the retention of URM students in STEM fields by accounting for baseline variables, such as pre-college academic achievement and socio-demographic characteristics, that could lead to bias in estimating results. Specifically, this study addresses limitations of previous studies by comparing participants and non-participants of the STEM enrichment program who are matched on a selection of baseline characteristics.

Details

Journal of Applied Research in Higher Education, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2050-7003

Keywords

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Article
Publication date: 22 July 2020

Fadwa Hammouh, Sima Zein, Rula Amr, Hadeel Ghazzawi, Dina Muharib, Dalya Al Saad and Hadil Subih

The purpose of this paper aims to assess the intake of dietary selenium among Jordanian adults in Madaba Governorate.

Abstract

Purpose

The purpose of this paper aims to assess the intake of dietary selenium among Jordanian adults in Madaba Governorate.

Design/methodology/approach

The authors conducted a cross-sectional study in Madaba Governorate. Convenience sampling was done at Madaba Governorate for this study. The subjects comprised 500 subjects (325 women and 175 men) aged from 18 to 60 years. A 24-h recall (24-HR) and Food Frequency Questionnaire (FFQ) were used to estimate the selenium intake in the studied population.

Findings

Mean of dietary selenium was more than the recommended amount by at least 2.5-fold in both methods FFQ and 24-HR (p = 0.004), while no significant difference was observed in selenium consumption per day for women and men respectively using FFQ. The results indicated that selenium consumption is higher than the RDA among Madaba population. A moderate correlation was found between both methods for all subjects, women and men, respectively (p < 0.05).

Originality/value

The authors conclude that the selenium intake in Jordanian population is significantly above the RDA. However, future studies are required to correlate this high intake with health benefits and exclude toxic effects of Selenium.

Details

Nutrition & Food Science , vol. 51 no. 3
Type: Research Article
ISSN: 0034-6659

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Article
Publication date: 10 June 2021

Jana Dwaidy, Dina Cheaib, Adla Jammoul and Nada El Darra

This study aims to evaluate the safety and quality of organic food product versus conventional ones in the Lebanese market.

Abstract

Purpose

This study aims to evaluate the safety and quality of organic food product versus conventional ones in the Lebanese market.

Design/methodology/approach

Selected organic and conventional Lemon and cucumber were assessed for the presence of pesticides residues using LC-MS/MS and GC/MS/MS, also compared at the level of total polyphenols content, flavonoids, tannins and tested for their antiradical and antibacterial activities.

Findings

The findings indicate that organic lemons were contaminated by four types of pesticide residues (33.33%), while one pesticide residue (22.22%) was detected in conventional one, which were all below the European Union Maximum Residue Limits. For cucumber, six pesticide residues (66.66%) were detected in organic samples, while in conventional, eight pesticide residues (55.55%) were detected. However, absolutely four samples (44.44%) in each of conventional and organic cucumber samples surpass the maximum residue levels. Both lemon and cucumber, regardless of the farming systems, possess potent antioxidant activity with no significant difference, except for lemon, where total polyphenol was highly significant in conventional. Additionally, this study showed that lemon of conventional origin was slightly more effective in inhibiting the growth of gram-positive and gram-negative bacterial strains compared to organic samples, while both cucumber types did not exert any antibacterial effect.

Originality/value

This is the first paper to assess the polyphenols, pesticide residue and biological activities of organic lemon and cucumber in Lebanese market as well as comparing conventional to organic.

Details

Nutrition & Food Science , vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0034-6659

Keywords

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